I've noticed on certain 737s (732, 733, 735, 73G), there seem to be two options for configuring the exit rows. One involves removing the window seats by the exit door and the other involves expanding the pitch between the rows on either side of the exit door.

Why do some airlines choose to remove the window seats rather than just expand the exit row seat pitch by a few inches? It seems they would be reducing the revenue potential of the aircraft. So, there must be some other reason. Does removing the window seats allow the airline to move the exit row a certain number of inches forward or backward to better suit their intended seat pitch/seating configuration?

I don't know if this topic would be better answered in the tech/ops forum...

I don't have too much to offer, but within the past 6 months I have sat in the exit rows of a 732 (CM SJO-PTY) and a 733 (US PHL-ORD). The CM 732 had no window seat, and the US 733 did. However, it seemed to me that the pitch was very generous on both planes.